mirror of https://github.com/Icinga/icinga2.git
154 lines
4.1 KiB
C++
154 lines
4.1 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "base/stream.hpp"
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#include <boost/algorithm/string/trim.hpp>
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using namespace icinga;
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void Stream::RegisterDataHandler(const boost::function<void(const Stream::Ptr&)>& handler)
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{
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if (SupportsWaiting())
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OnDataAvailable.connect(handler);
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else
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BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support waiting."));
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}
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bool Stream::SupportsWaiting(void) const
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{
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return false;
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}
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bool Stream::IsDataAvailable(void) const
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{
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return false;
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}
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void Stream::Shutdown(void)
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{
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BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support Shutdown()."));
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}
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size_t Stream::Peek(void *buffer, size_t count, bool allow_partial)
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{
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BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support Peek()."));
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}
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void Stream::SignalDataAvailable(void)
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{
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OnDataAvailable(this);
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{
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boost::mutex::scoped_lock lock(m_Mutex);
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m_CV.notify_all();
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}
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}
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bool Stream::WaitForData(int timeout)
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{
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if (!SupportsWaiting())
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BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support waiting."));
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boost::mutex::scoped_lock lock(m_Mutex);
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while (!IsDataAvailable() && !IsEof())
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if (timeout < 0)
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m_CV.wait(lock);
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else
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m_CV.timed_wait(lock, boost::posix_time::milliseconds(timeout * 1000));
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return IsDataAvailable() || IsEof();
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}
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StreamReadStatus Stream::ReadLine(String *line, StreamReadContext& context, bool may_wait)
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{
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if (context.Eof)
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return StatusEof;
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if (context.MustRead) {
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if (!context.FillFromStream(this, may_wait)) {
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context.Eof = true;
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*line = String(context.Buffer, &(context.Buffer[context.Size]));
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boost::algorithm::trim_right(*line);
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return StatusNewItem;
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}
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}
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int count = 0;
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size_t first_newline;
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for (size_t i = 0; i < context.Size; i++) {
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if (context.Buffer[i] == '\n') {
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count++;
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if (count == 1)
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first_newline = i;
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else if (count > 1)
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break;
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}
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}
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context.MustRead = (count <= 1);
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if (count > 0) {
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*line = String(context.Buffer, &(context.Buffer[first_newline]));
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boost::algorithm::trim_right(*line);
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context.DropData(first_newline + 1);
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return StatusNewItem;
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}
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return StatusNeedData;
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}
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bool StreamReadContext::FillFromStream(const Stream::Ptr& stream, bool may_wait)
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{
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if (may_wait && stream->SupportsWaiting())
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stream->WaitForData();
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size_t count = 0;
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do {
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Buffer = (char *)realloc(Buffer, Size + 4096);
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if (!Buffer)
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throw std::bad_alloc();
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size_t rc = stream->Read(Buffer + Size, 4096, true);
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Size += rc;
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count += rc;
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} while (count < 64 * 1024 && stream->IsDataAvailable());
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if (count == 0 && stream->IsEof())
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return false;
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else
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return true;
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}
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void StreamReadContext::DropData(size_t count)
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{
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ASSERT(count <= Size);
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memmove(Buffer, Buffer + count, Size - count);
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Size -= count;
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}
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